Radio resistor coupler unit



March 23 1926. I 1,577,443

L. s. BRACH RADIO RESISTOR COUPLER UNIT Filed July 21, 1925 v INVENTOR LEO/V 5 BfiAC/I Y, c mpa y l9 'Referrlng dZZ'u/ho'm. may cpmern' Beit known that L LnoN V I s i. 'zen ofthefUnitedlStatesg gresidin t East @Orange in i-thefeou ty -oiiEssex; State of 'e' New Jersej fhavle 'invented icertairr new and useful Improvements in a i Radio Resistor j Coliplei-- ,nitgeofwhich ithe} following is a; description;reference being' had to' thle ac- -1 ing drawing-andto the figures 1. "of ferenc'ej-markedthereon 'fiven tion relate's 'toaa unitary s'truciconneftiom with radio cirhoseused in a receiving- T ,ceiving iciicuitsthe resistance-coupler-method y si nna? In 'a resistance Coupling cirhe esistance',units-are nsnally 'asso-" ciated and in'order to simplify-the wiring 2 i oupli-n'g'f set, If haV'e con V y deviceicornprisingf a pair esistance' -nits zwitlr an associated conasing-Qwith pwperffi the post's" offithelinit 'thfls the principal object "f myjfinventiofi is at nce-app rentr i which-"is f Ql'lstrncted as to suitable-designer I on plate by which cf-the, ma te eadily Pas- Another =0 'et of {my mvention is to pfo- Videf-Yauni-t here'tdfore",a-descrihed' which *shallloe sina ,--fcompact= and neat in designfif. My invention will begbest understood by reference tdthe attached drawingin which- Figure- 1=*' is}}a plan NlGW, approximately full-size o'fthe complete-unit. s s

Fi 11"e'2.is a View of Fig. 1 from .thebottom or reversejsideffrom that shown in l, ',"b ut.withthegcoyer.plate removed. V gnrefiiyis' fa view sir nilar to Fig. 2 but" with the condenser removed.

's 'a"section onf-the line 4 4: of- Fig. 2;

I f now' ,tokthe. drawing wherein like numbers refer. to corresponding parts the lvarions views, 1 is; a casingpreferably .of suitable molded material having a body.

parta and flan eez on-atxleast two sides,

wew reremain.

' pairs in connection "with a" con-* object" of myinvention? "is rte;

unit. if "The hody 'partoi the; casifigi is preferably slightly 'tap er'edg as indicated in Fig; 1," and is? provided withv aLwindow 5. z'lhe 1 side walls" L of the 'r'casingiz'arolind "the windows 5P=areixbeveled ia's indicated at 6. Within 1 the inte'riorz-o'f "the: body part of the casing '1 and over the window?fins-placed a strip a'transparent ;materiahsuch eellu lold behindwhich is-placed i ajfdesign'ation late 8 on which may be stamped or printed he required data to iidentify the kind f resistor-coupler carried within 1 the casing;

Preferably positioned hehind': -"the'i designa- NEWFIEBSEYJA'SSIQK' sec smut.-

'fThe-ihange s ar iQ Pht -8 is a backing strip-9; Theparts Sand 9-1nay hehelddnposit ion with 'replace'by hridging'them with twq' resistance nnlts-10= which =are securelyi held within-the "casing )bIy: gterminal screws or 'is'tuds' 11. These studs 'fare. identified ion the ontsi'de-of the. e-asingwlpas shown Figqlfibyr letters" for Plate, G -for'Grid5 B -for-one side of-i "'thehattery andF==for"Filamenti zMonntedwithin the casing 1 "and dire I over or behind the resistancesn'nits 10, is

a'fco'ndenser" 12 which ier provided: with mounting lugs 13 and14 that are fenga'ged"- one pair of the' stl lds 1 11 assh'own innFig; 2 thereby bridging the condenser12direct1y cross! the: ends ofthe resistanceaunits 10. he bottom side offthe casing "is fitted with a (Boyer- 17 *res'tin against the rim 15f, the

ico'rferhplateibeing eld in position by eyelets 16-ft5s shown in ig. 1. "Since 'athe resistance u'fiitslOmay'beOf difierent--va1ues',ffor, dif-' 'ferentf"fcoriditionsg' it is f ess'ential to know wha'tf th'ese Valnes are 011 anyigiven' I unit f? consequently; these; values,l together with the condenser valueiw ith a'riy othergindicim' is 1 spect to the window 25*"i1rany"='satisfaet0ry v s manner, but, I1 have chosen to? hold" these in 5 ctly I placed on 'the designation plate 8, and the I inforrnation'then appears through the win-j dow 5 so that the proper resistor-coupling ,unit maybe chosen when it is desired to connectthern into a radio circuit. I From what has-been'saidit will be seen that I have -:jconstructed a resistor-coupler unit which isvery small and. compact and one. that is readi GIlICllit; s What I desirelto claim isi 1; radio resistor coupler um Q ly connected intoa radio;

tcomprising -acasmg having a window there n'and 

